Ophthalmic mounting



' w. H. BOUTELLEL OPHTHALMIC MOUNTING. APPLICATION FlLED J ULY29-19l9.

1,353,311, Pa tentedsept. 21,1920.

\Hlll IINVENTOR W H. BOUTELLE ATTORNEYS UNITED STATES PATENT OFFICE.

WILLIAM H. BOUTELLE, 0F SOUTHBRIDGE, MASSACHUSETTS, ASSIGNOR T0 AMERICAN OPTICAL COMPANY, OF SOUTHIBRIDGrE, MASSACHUSETTS, A. VOLUNTARY ASSOCIA- 'IION or MASSACHUSETTS.

OPHTHALMIC MOUNTING.

Specification of Letters Patent.

Application filed July 29, 1919. Serial No. 314,077. 7

To all whom it may concern:

Be it known that I, WILLIAM H. Boo- TELLE, a citizen of the United States, residing at Southbridge, in the county of Worcester and State of Massachusetts, have invented certain new and useful Improvements in Ophthalmic Mountings, of which the following is a specification.

This invention relates to improvements in ophthalmic mountings and has particular reference to what is commonly known as a finger-piece mounting, or mounting retained on the face through the use of spring'actuated clip arms.

The principal object of the present invention is the provision of novel and improved means for readily and securely fastening the arms and associated parts in position on the mounting. j

A further object of the invention is the provision of securing means which may be instantly applied or detached, as desired.

Other objects and advantages of my improved construction should be readily apparent by reference to the following specification taken in connection with the accom panying drawings, and it will be understood that I may make any modifications in the specific details of construction shown and described within the scope of the appended claims without departing from or exceeding the spirit of my invention.

Figure I represents a front View of a mounting embodying my improvements.

Fig. II represents an enlarged vertical sectional view of one side of such a mount- Iig. III represents a plan view of a side of the mounting.

Fig. IV represents an enlarged plan view of one form of locking member.

Fig. V represents a similar edge view thereof Fig. VI represents a detail view of a slightly modified construction.

In the drawings the numeral 1 is emv ployed to designate the bridge provided with a pivot seat 2, to which is preferably secured one end of the frame 3, adapted to extend around the lens 4, having on its opposite end the end piece 5. Secured in the seat 2 is the threaded portion 6 of my pivot post 7 having engaged on its lower end the nut 8 of the end piece 5, by which the frame is held in closed position around the lens 4:.

Rotatably mounted upon the post 7 below the groove 8 is the fingerpiece lever 10, having the barrel portion 11 extending upward around the post and encircled by the actu-' ating spring 12. To satisfactorily retain the parts in position but permit of their ready removal when desired, I preferably make use of my improved locking washer 13, having the elongated or oval slot or aperture 14 and the lateral notches 15 adapted to receive a .suitablespanner. In .use the locking device is pressed down onto thepost over the head 9 which is ofshape to Suitably pass through the slot 14. The locking member 13 is then held and pressed downward with the spanner and given a quarter rotation, when it will look under the projecting portions of the head, as is clearly illustrated in connection with Figs. II and III, when it will prevent any possible upward movement of. the barrel portion of the lever or of the actuatingspring and will satisfactorily retain these parts in place. If desired, to

facilitate this rotative locking movement the inside of the slot 14: may have the slightly rounded portions 16 to bear against the post and keep the locking member centrally thereon, as it is termed.

In order to as far as possible eliminate accidental loosening or displacing of the locking member thus employed, I preferably strike the blank for the lock washer 13 to produce the spring bumps or resilient portions 17 which will snap by the ends of the head as the washer is rotated, but which will project sufiiciently to yieldingly engage the elongated sides of the head when the washer is in locked position and thus prevent its accidental loosening rotation although permitting of its readily being twisted loose when desired.

As an alternative form, in place of the oval head on the post I may simply form the groove 8 and make use of the split looking washer 18 having the central recess 19, into which the body of the post will fit, and

having its lips 20 at the, open or split side so rounded that they may besnapped by the post for application or removal of the locking device as desired but Will ordinarily exert a spring force tending to retain the lockingmember in position.

I claim:

1. In a device of the character described, the combination with a post having an elongated head, of a locking washer having an elongated slot to receive the head, and adapted to be secured in position by relative rotation of the post and washer, and means for resiliently securing the washer in desired relatively rotated position.

2. In a device of the character described, the combination with a bridge having a pivot seat, of a post having a threaded portion engaged in the seat and depending therebelow for engagement with a frame fastening device and having an upwardly projecting pivot portion terminating in a grooved upper end, a lever having a barrel portion rotatably'mounted on the post, a spring encircling the barrel, and a resilient locking member engaged on the post above said parts for securing them in position thereon.

"3, A device of the character described, including a post, a finger-piece lever and I spring mounted on the post, said post hav- 4. In an ophthalmic mounting, the combination with a post having an elongated head, of a locking washer having an elongated slot to receive the head and adapted to be secured in position by relative rotation of the post and washer.

5. In an ophthalmic mounting, the combination with a fitting, of a post mounted on the fitting and having a portion depending therebelow for-engagement with a frame fastening device and having an upwardly projecting pivot portion terminating in a grooved upper 'end, a lever rotatably mounted "on the post and a locking member engaged in the groove of the post above the lever for securing the lever in position.

In testimony whereof I have 'aflixed my signature, in presence of two witnesses.

WILLIAM H. B'OUTELLE.

Witnesses: Y

' H. E. COLEMAN,

A. M. VDELEHANTY. 

